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The Effect of Gangion Floats on Bait-loss and Catch Rates in Longlining
(ICES CM Documents;1984/B:8, Working paper, 1984)The use of gangion floats will expectedly reduces bait loss and increase catch rates in bottom longlining. Two floats of 5- and 8 g buoyancy are tested through flume tank experiments, underwater observations in the field ... -
The effect of illumination on alevins of Atlantic salmon (Salmo salar) and rainbow trout (S. gairdneri), incubated on different substrates
(ICES CM Documents;1985/F:27, Working paper, 1985)Atlantic salmon (Salmo salar) and rainbow trout (S. gairdneri) eggs were incubated in plexi-glass aquariums. After hatching, alevins were kept in darkness, two groups of each species without substrate, two groups in ... -
The effect of shading in pen rearing of Atlantic salmon (Salmo salar)
(ICES CM Documents;1988/F:18, Working paper, 1988)A full scale pen rearing experiment with covers to reduce illumination was carried out. No significant effects were observed on growth, mortality, ectoparasite infection, maturation or net pen fouling. -
The effective swept volume of a bottom trawl
(ICES CM Documents;2004/R:7, Working paper, 2004)The reaction of individual fish towards an approaching trawling vessel has previously been measured using target-tracking methods. In this paper these measured velocities are fitted to a deterministic mean behaviour ... -
The effects of light on the mortality of different pigmented atlantic salmon (Salmo salar) eggs.
(ICES CM Documents;1981/M:16, Working paper, 1981) -
The effects of maternal status of Arcto-Norwegian cod on egg quality and vitality of early larvae. 1. The collection and characteristics of the cod females, a pilot study
(ICES CM Documents;1992/G:78, Working paper, 1992)On the basis of a new field method to determine the stage of spawning, egg groups from Arcto-Norwegian cod females in different stage of spawning were selected for further studies on egg quality and vitality of early ... -
The effects of maternal status of Arcto-Norwegian cod on egg quality and vitality of early larvae. 2. Preliminary results of the experiment in 1992
(ICES CM Documents;1992/G:79, Working paper, 1992)The stage of spawning of females of the Arcto-Norwegian cod caught during peak spawning in Lofoten had a profound effect on several vital parameters of the eggs and larvae. Significant negative correlations were ... -
The effects of oil-base drilling mud and crude oil on demersal fish eggs
(ICES CM Documents;1988/E:19, Working paper, 1988)The Norwegian spring spawning herring and the Barents Sea capelin both with demersal eggs, spawn in relative small and concentrated areas on the Norwegian continental shelf. Besides potential impact on the fish resources ... -
The effects of the 1983 herring year-class on the 1983 capelin year-class
(ICES CM Documents;1988/H:53, Working paper, 1988) -
The egg production and spawning stock size of the North Sea mackerel and horse mackerel stocks in 1988
(ICES CM Documents;1989/H:16, Working paper, 1989)During the period 5 April to 28 July 1988 the spawning areas of North Sea mackerel and horse mackerel were investigated by research vessels from the Netherlands, Denmark and Norway. Based on the plankton samples ... -
The egg production and spawning stock size of the North Sea mackerel stock in 1984
(ICES CM Documents;1985/H:38, Working paper, 1985)During the period 22 May to 17 July the spawning area of North Sea mackerel was investigated by research vessels from Scotland, the Netherlands, Denmark and Norway. Based on the 629 plankton samples and temperature ... -
The egg production and spawning stock size of the North Sea mackerel stock in 1990
(ICES CM Documents;1991/H:11, Working paper, 1991)During the period 12 March to 20 July 1990 the spawning area of the North Sea mackerel was investigated by research vessels from the Netherlands, Denmark and Norway. Based on the plankton samples and temperature observations ... -
The equivalent beam angle and its effective value when applying an integrator threshold
(ICES CM Documents;1987/B:35, Working paper, 1987)In a noise-limited echo integration system, a threshold is applied in order to avoid the contribution from noise. As the signal-to-noise ratio decreases with range, the effective observation volume for small targets is ... -
The health status of commercially exploited native flat oysters (Ostrea edulis) in Norway
(ICES CM Documents;1992/K:44, Working paper, 1992)The first systematic health survey of commercially exploited flat oysters (Ostrea edulis) has been carried out since 1989. The survey was performed on two important broodstocks in traditional oyster-production areas. No ... -
The herring fishery
(ICES CM Documents;1988/H:58, Working paper, 1988) -
The importance of predator–prey overlap—predicting North Sea cod recovery with a multispecies assessment model Alexander
(ICES CM documents;2010/C:11, Working paper, 2010)The Ecosystem Approach to Fisheries (EAF), nowadays worldwide on political agendas, takes into account ecosystem knowledge, considers multiple external influences and looks at the broader impact of fisheries on the entire ... -
The influence of a stimulated transportation of newly fertilized Atlantic salmon eggs on mortality to the eyed stage
(ICES CM Documents;1985/F:29, Working paper, 1985)Transport of newly fertilized eggs has often resulted in severe mortality of the eggs during incubation to the eyed stage. To investigate the effect of transport on mortality, pooled eggs from several females were handled ... -
The Jutland Current: Nutrients and physical oceanographic conditions in late autumn 1989
(ICES CM Documents;1990/C:35, Working paper, 1990)Hydrography, currents, nutrients, water transparency, in situ chlorophyll fluorescence and primary production were studied during a cruise with R/V "G.O. Sars" to the west coast of Denmark, Skagerrak and Kattegat from ... -
The killing of the north-east Atlantic plankton feeders: Man the murderer or accessory to the crime?
(ICES CM Documents;1988/H:59, Working paper, 1988) -
The measurement error of marine survey catches: the bottom trawl case
(ICES CM Documents;2001/P:6, Working paper, 2001)We have formulated a model for analyzing the measurement error of marine survey abundance estimates using data from parallel surveys (trawl haul or acoustic measurement). The measurement error is defined as the component ...